Generally, it is from a wheel balance problem. I have seen weights that have come off, mud or ice on the inside well of the rim and road tar that gets caught in the tread to cause this.
I have my share of wheel joints on these go bad also. You would have to be 4 WD mode though for this to be felt typically. Should check em regardless.
Sunday, September 2nd, 2007 AT 7:56 AM